Method of making open ended envelopes



May 31, 1932. v L, STONE 1,860,965

METHOD OF MAKING OPEN ENDED ENVELOPES Filed Feb. 4, 19:50

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Patented May 31, 11932 rate LEO STONE, F BROCKTGN, MASSACHUSETTS IKETHOD OF MAKING OPEN ENDED ENVELOPES Application filed February. 4, 1930. Serial No. 425,878.

This invention relates to a twopart open ended envelope adapted particularly for use in packaging small articles such as cobblers nails for the market and consists in the improved method of making such bags hereinafter described and claimed.

Of the accompanying drawings forming a part of this specification;-

Figure l shows-in perspectivea partly completed envelope.

Figure 2 is a perspective view, showing the envelope in condition for charging.

Figures 8 and 4 are respectively transverse and longitudinal sectional views of the envelope.

Figure 5 shows in perspective the blank constituting the front member of the en- 7 velope.

Figure 6 shows in perspective the blank constituting the back member.

Figures 7 and 8 show in perspective the supply strips hereinafter described.

The same reference characters indicate the same parts in all of the figures.

The envelope shown by the drawings is composed of a back member 12, and a front member 13. Said members are substantially rectangular so that no waste is involved in their production, and may be made of any suitable flexible sheet material, such as paper.

The thickness of the sheet material is considerably exaggerated in the drawings.

' The members are assembled and united,

r as hereinafter described, to form an envelope which is closed at one end and at its longitudinal edges, open at its opposite end to form a mouth, and provided at the mouth with a flap adapted to facilitate the charging of the envelope and close the mouth and confine a charge.

The back member 12 is longer than the front member 13, and the front member is wider than the back member, as shown by Figures 5 and 6.

Before assembling the members the front member 13 is longitudinally folded at 14, adjacent its longitudinal 'edges to provide two longitudinal flaps 15 projecting inwardly from the folds and underlapping the front member. Said flaps are then superimposed on longitudinal edge portions of the back member 12, as shown by Figure 1, and cemented thereto the flap being within the bag. The folds 14 are spaced apart a distance equal to the width of the back member so that they determine the Width of the front member.

The members are so assembled that the end portions of the back member project from opposite ends of the front member, as shown by Figure 1. Inassem'bling the members the longitudinal folds 14 are caused to coincide with the longitudinal edges of the back member and form therewith the longitudinal edges of the envelope.

The envelope in the condition shown by Figure 1, is prepared for charging by folding one of the projecting transverse end portions of the back member on the line 19, to form a closing flap 20, and cementing said flap to a transverse end portion of the front member, thereby closing one end of the envelope.

The transverse end portion of the back member 12, projecting from the opposite end of the front member 13, constitutes a flap 21, 7 which is left open when the envelope is completed, to facilitate the charging of the envelope and is adapted to be folded on the line 22 and superimposed on a transverse end portion of the front member, as shown by dotted lines in Figure 4, to close the mouth of the envelope after the latter is charged. The flap 21 may be gummed, if desired, to cause its adhesion to the portion of the front member on which it is superimposed;

Envelopes embodying the invention may be rapidly and economically manufactured, the members being producea'ble without waste of material, from two supply strips of indeterminate length and different widths, by transversely severing said strips to form the described members, and assembling and uniting said members as described.

Figures 5 and 6 show by dotted lines reserve portions of the supply strips from which the members 12 and 13 are severed. Said strips have parallel longitudinal edges and may be prepared in rolled form, as indicated by Figures 7 and 8, and unwound and delivered as required, to severing means adapted to sever the strips transversely and thus provide the rectangular members 12 and 13. The supply strip shown by Figures 6 and 8, is designated by 12a, and the strip shown by Figures and 7, is designated by 13a.

My improved method is distinguished in part by the fact that, the front strip 13 is longitudinally folded to reduce it to the same width as the back strip and convert its longitudinal edge portions into longitudinal flaps 15 underlapping the inner side of the front strip, so that the operation of severing said strip into envelope members provides front members each having two flaps 15 adapted to be located between the front and back members of the envelope and within the latter and to be simultaneously cemented to the back member.

An advantage of my two-part envelope is found in the fact that one member of the envelope may have a different color from the other member, so that the envelope may constitute a trade-mark identifying the goods packed therein.

I claim:

That improvement in the method of making an open ended envelope, which consists in providing a front and a back strip, each of indeterminate length and having parallel longitudinal edges, the front strip being wider than the back strip, and having longitudinal edge portions determining the original width of the front strip, longitudinally folding the front strip to reduce it to the same width as the back strip and convert said edge portions into longitudinal flaps underlapping the inner side of the front strip, transversely severing said strips to detach rectangular front and back envelope members therefrom, the front members having the longitudinal flaps and being shorter than the back members, assembling a front and a back member with their longitudinal edges coinciding and the longitudinal flaps of the front member located between the two members and within the envelope, cementing the said longitudinal flaps to longitudinal edge portions of the back member and at the same time causing transverse end portions of the back member to project from the opposite ends of the front member, transversely folding one of said proecting end portions to cause it to overlap one end of the front member, cementing said folded end portion to close one end of the envelope, and leaving the other transverse end portion projecting from the opposite end of the envelope to facilitate the charging thereof.

In testimony whereof I have afiixed my signature.

LEO STONE. 

